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<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>函数参数默认值</title>
    <style>

    </style>
</head>

<body>

    <script>
        //es6允许给函数参数赋值初始值
        //1.形参初始值 具有默认值的参数，一般位置要靠后
        // function add(a, b, c=10) {
        //     return a + b + c
        // }
        // let result=add(1,2);
        // console.log(result)

        //2.与解构赋值结合
        function connect(options){
           let host=options.host
        }
        connect({
            host:"locahost",
            username:"root",
            password:"root",
            port:3306
        })
    </script>
</body>

</html>